Banca de DEFESA: NATALICE DOS SANTOS SALES

Uma banca de DEFESA de DOUTORADO foi cadastrada pelo programa.
DISCENTE : NATALICE DOS SANTOS SALES
DATA : 23/05/2019
HORA: 14:00
LOCAL: Sala 34 do icbs
TÍTULO:

IMPORTANCE OF BIOTOPES AND AVAILABILITY OF FOOD RESOURCES IN THE STRUCTURE OF FISH METACOMUNITY IN A TROPICAL ESTUARY, NORTHEAST OF BRAZIL

PALAVRAS-CHAVES:

Heterogeneity; dispersal; trophic webs; ecological guilds

PÁGINAS: 183
GRANDE ÁREA: Ciências Biológicas
ÁREA: Ecologia
SUBÁREA: Ecologia de Ecossistemas
RESUMO:

Mesohabitat heterogeneity of the tropical estuaries influences the patterns of fish richness and diversity, favoring, among other processes, recruitment and niche partitioning, allowing the coexistence of fish species in these ecosystems. The aim of present work is to analyze the different environmental factors of mesohabitats and their influence on the distribution of fish species. he study was carried out in a tropical estuary, located in the northeast of Brazil, and that presents a peculiar characteristic due to the strong influence of the semi-arid
region, because in all its upper extension the river is intermittent, and for that reason there is small contribution from drainage basin arriving to the estuary. Fishes were collected using a beach-seine net during the rainy (June, July and August/2015) and dry (October and November/2015 and January/ 2016) seasons. Samplings were carried out in five mesohabitats present in the estuary: Beaches (PA), Sea grass beds (FM), Tidal mudflats (PM), Mangroves (MA) and Marginal Vegetation (VM). The results showed that Mudflats showed the greast density and biomass of juveniles among the mesohabitats. Salinity is the predictor factor influencing the distribution of the fish assemblages of PA, FM, PM and MA, whereas VM was influenced by MO, coarse sand, chlorophyll and transparency. Density and biomass showed highest values during the rainy season, indicating the importance of this period for the dynamics of estuarine fish assemblages in this region of scarce rains. Species in Marine Dependent Estuary (MED) guild showed numerical abundance, mainly by representatives
of the families Gerreidae and Engraulidae. This abundance of species dependent on the estuary at a certain stage of development emphasizes the importance of this ecosystem as a nursery for several species of economic
and/or ecological importance.

MEMBROS DA BANCA:
Externo à Instituição - ANA CRISTINA PETRY
Interno - 387200 - FRANCISCO GERSON ARAUJO
Interno - 2143107 - LEONARDO MITRANO NEVES
Externo à Instituição - LUCIANO NEVES DOS SANTOS
Externo à Instituição - MARCIA CRISTINA COSTA DE AZEVEDO
Externo à Instituição - MIRIAM PILZ ALBRECHT